JP2015179782A - 半導体装置 - Google Patents
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims description 62
- 239000000758 substrate Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 143
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 138
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- 229910052759 nickel Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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Abstract
Description
本実施形態の半導体装置は、第1導電型のトランジスタであって、第1導電型のSiC層と、SiC層に設けられる第2導電型のSiCのウェル領域と、ウェル領域に設けられる第1導電型のSiCの第1のソース領域と、ウェル領域に設けられる第1導電型のSiCの第1のドレイン領域と、第1のソース領域と電気的に接続される第1のソース電極と、第1のドレイン領域と電気的に接続される第1のドレイン電極と、第1のソース領域と第1のドレイン領域に挟まれるウェル領域との間に、第1のゲート絶縁膜を介して設けられる第1のゲート電極と、を有する第1のトランジスタを備える。また、第2導電型のトランジスタであって、SiC層に設けられる第2導電型のSiCの第2のソース領域と、SiC層に設けられる第2導電型のSiCの第2のドレイン領域と、第2のソース領域と電気的に接続される第2のソース電極と、第2のドレイン領域と電気的に接続される第2のドレイン電極と、第2のソース領域と第2のドレイン領域に挟まれるSiC層との間に、第2のゲート絶縁膜を介して設けられる第2のゲート電極とを有し、チャネル形成部の向きが第1のトランジスタのチャネル形成部の向きとの間に0度より大きく90度より小さい角度を有する第2のトランジスタを備える。さらに、ウェル領域と、第2のソース領域および第2のドレイン領域との間に設けられ、一端がSiC層に位置する素子分離領域と、を備える。
本実施形態の半導体装置は、n型トランジスタとp型トランジスタのパターンが異なること以外は、第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、第1の実施形態の半導体装置と、SiCパワー半導体とが、混載されたパワー半導体モジュールであること以外は、第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
14 SiC層
16 ウェル領域
18 第1のソース領域
20 p型トランジスタ(第2のトランジスタ)
22 第1のドレイン領域
24 第1のコンタクト領域
26 第1のソース電極
28 第1のドレイン電極
30 第1のゲート絶縁膜
32 第1のゲート電極
38 第2のソース領域
42 第2のドレイン領域
44 第2のコンタクト領域
46 第3のコンタクト領域
48 第1のダミー領域
50 第2のダミー領域
56 第2のソース電極
58 第2のドレイン電極
60 第2のゲート絶縁膜
62 第2のゲート電極
64 素子分離領域
Claims (10)
- 第1導電型のSiC層と、
前記SiC層に設けられる第2導電型のSiCのウェル領域と、
前記ウェル領域に設けられる第1導電型のSiCの第1のソース領域と、
前記ウェル領域に設けられる第1導電型のSiCの第1のドレイン領域と、
前記第1のソース領域と電気的に接続される第1のソース電極と、
前記第1のドレイン領域と電気的に接続される第1のドレイン電極と、
前記第1のソース領域と前記第1のドレイン領域に挟まれる前記ウェル領域との間に、第1のゲート絶縁膜を介して設けられる第1のゲート電極と、を有する第1導電型の第1のトランジスタと、
前記SiC層に設けられる第2導電型のSiCの第2のソース領域と、
前記SiC層に設けられる第2導電型のSiCの第2のドレイン領域と、
前記第2のソース領域と電気的に接続される第2のソース電極と、
前記第2のドレイン領域と電気的に接続される第2のドレイン電極と、
前記第2のソース領域と前記第2のドレイン領域に挟まれる前記SiC層との間に、第2のゲート絶縁膜を介して設けられる第2のゲート電極とを有し、チャネル形成部の向きが前記第1のトランジスタのチャネル形成部の向きとの間に0度より大きく90度より小さい角度を有する第2導電型の第2のトランジスタと、
前記ウェル領域と、前記第2のドレイン領域との間に設けられ、一端が前記SiC層に位置する素子分離領域と、
を備えることを特徴とする半導体装置。 - 前記ウェル領域と前記第1のソース電極との間に設けられ、前記ウェル領域より高い第2導電型の不純物濃度を有する第1のコンタクト領域を、さらに有することを特徴とする請求項1記載の半導体装置。
- 前記第2のソース領域と前記第2のソース電極との間に設けられ、前記第2のソース領域より高い第2導電型の不純物濃度を有する第2のコンタクト領域と、前記第2のドレイン領域と前記第2のドレイン電極との間に設けられ、前記第2のドレイン領域より高い第2導電型の不純物濃度を有する第3のコンタクト領域とを、さらに有することを特徴とする請求項1または請求項2記載の半導体装置。
- 前記第2のソース領域と前記第2のコンタクト領域との間に設けられる第1導電型のSiCの第1のダミー領域と、前記第2のドレイン領域と前記第3のコンタクト領域との間に設けられる第1導電型のSiCの第2のダミー領域とを、さらに有することを特徴とする請求項3記載の半導体装置。
- 前記SiC層の前記第2のソース領域および第2のドレイン領域と反対側に設けられ、前記第2のソース電極と電気的に接続される基板電極を、さらに有することを特徴とする請求項1ないし請求項4いずれか一項記載の半導体装置。
- 前記ウェル領域、前記第2のソース領域および第2のドレイン領域が同一の不純物濃度を有することを特徴とする請求項1ないし請求項5いずれか一項記載の半導体装置。
- 前記角度が45±5度であることを特徴とする請求項1ないし請求項6いずれか一項記載の半導体装置。
- 前記角度が60±5度であることを特徴とする請求項1ないし請求項6いずれか一項記載の半導体装置。
- 前記第1のゲート電極と前記第2のゲート電極とが、異なる仕事関数を有することを特徴とする請求項1ないし請求項8いずれか一項記載の半導体装置。
- 前記第1のゲート絶縁膜と前記第2のゲート絶縁膜とが、異なる材料であることを特徴とする請求項1ないし請求項9いずれか一項記載の半導体装置。
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